Thanks for your answer. We found a solution and finally don't need 110V, 24V is better
I've got another problem (perhaps may I create a new topic ?)
I want to write 16 outputs at the same time (like function 15 of Modbus protocol) but MD2424 only support function 16.
So I have created a simple custom function : OUTPUT[1] = DM[1]
clocked on 100ms.
It seems to work but when I used Modbus function 16 to write to DM, data memory is not persistent. So I need to send Modbus command every 100ms which not very efficient !
Do you have any solutions to simulate correctly Modbus function 16 ?
Thanks in advance for your help.